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  1. Path: sparky!uunet!destroyer!cs.ubc.ca!unixg.ubc.ca!reg.triumf.ca!asnd
  2. From: asnd@reg.triumf.ca (Donald Arseneau)
  3. Newsgroups: comp.text.tex
  4. Subject: Re: Metafont to scalable outline font formats
  5. Date: 28 Jan 1993 04:30 PST
  6. Organization: TRIUMF: Tri-University Meson Facility
  7. Lines: 48
  8. Distribution: world
  9. Message-ID: <28JAN199304305154@reg.triumf.ca>
  10. References: <1993Jan26.103951.24173@ucc.su.OZ.AU> <WALSH.93Jan26170650@ibis.cs.umass.edu> <1993Jan28.093148.13399@ucc.su.OZ.AU>
  11. NNTP-Posting-Host: reg.triumf.ca
  12. News-Software: VAX/VMS VNEWS 1.41    
  13.  
  14. In article <1993Jan28.093148.13399@ucc.su.OZ.AU>, christie@extro.ucc.su.OZ.AU (Chris Tham) writes...
  15. >In article <WALSH.93Jan26170650@ibis.cs.umass.edu> walsh@cs.umass.edu writes:
  16. >>In point of fact, resolution enhancement is automatic. 
  17. >I can't see why RET should work on bitmaps (including bitmapped fonts) unless
  18. >there is a little bit of AI in the RET code that guesses which edges need
  19. >to be filled up and how.  If there _is_ some intelligence I would be wary
  20. >on how it would handle images and would probably want to turn it off.
  21.  
  22. I wouldn't call it AI, but there is smoothing code.  When I've plotted 
  23. graphs with nearly vertical lines, the bitmapped lines are staricases 
  24. with steps too far apart for RET to notice:
  25.  
  26. ##
  27. ## = 1 pixel
  28.  
  29.           Bitmap      -->    RET         I want
  30.  
  31.              ####           ****           OOOO
  32.              ####           ****           OOOO
  33.              ####           ****           OOOO
  34.              ####           ****          OOOO
  35.              ####           ****          OOOO
  36.              ####          ****           OOOO
  37.            ####            ****           OOOO
  38.            ####           ****            OOOO
  39.            ####           ****            OOOO
  40.            ####           ****            OOOO
  41.            ####           ****           OOOO
  42.            ####           ****           OOOO
  43.            ####           ****           OOOO
  44.            ####           ****           OOOO
  45.            ####           ****           OOOO
  46.            ####           ****           OOOO
  47.            ####           ****          OOOO
  48.            ####           ****          OOOO
  49.            ####           ****          OOOO
  50.            ####          ****           OOOO
  51.          ####            ****           OOOO
  52.          ####           ****            OOOO
  53.          ####           ****            OOOO
  54.          ####           ****           OOOO
  55.          ####           ****           OOOO
  56.          ####           ****           OOOO
  57.  
  58.  
  59. RET does a good job of smoothing the edges of {\it I}.
  60.  
  61. Donald Arseneau       asnd@reg.triumf.ca
  62.